1Gb: x4, x8, x16 DDR2 SDRAM
ODT Timing
Figure 81: ODT Timing for Entering and Exiting Power-Down Mode
Synchronous
CKE
tANPD (3 tCKs)
First CKE latched LOW
Synchronous or
Asynchronous
tAXPD (8 tCKs)
First CKE latched HIGH
Any mode except
self refresh mode
Applicable modes
Active power-down fast (synchronous)
Active power-down slow (asynchronous)
Precharge power-down (asynchronous)
Synchronous
Any mode except
self refresh mode
tAOND/tAOFD
Applicable timing parameters
tAOND/tAOFD (synchronous)
tAONPD/tAOFPD (asynchronous)
tAOND/tAOFD
PDF: 09005aef8565148a
1GbDDR2.pdf – Rev. AA 07/14 EN
128
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